Americans may be angry about affordability, but gas prices are the cheapest they’ve been all year in most states

This holiday season, many U.S. drivers are getting the gift of lower gas prices.

According to data from motor club AAA, December has been the cheapest month for prices at the pump this year. The national average for unleaded gasoline has stayed below the $3 mark since Dec. 2, falling to its lowest level of about $2.85 a gallon on Monday.

That figure has inched up slightly since, sitting at closer to $2.86 a gallon Tuesday — but overall, consumers hitting the road ahead of the...